﻿/*    
Nemulation: A .NET based framework/platform for virtualization applications
Copyright (C) 2011 Bryan Perris

This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License along
with this program; if not, write to the Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.IO;
using System.Runtime.InteropServices;
using System.Security;

namespace NEmu.Utilities
{
    public static class StreamTools
    {
        [SecurityCritical]
        public static TStruct FillStruct<TStruct>(Stream source) where TStruct : struct
        {
            TStruct theStruct;

            if (!source.CanRead)
                throw new ArgumentException("can't read source!");

            source.Position = 0;
            byte[] buffer = new byte[Marshal.SizeOf(typeof(TStruct))];
            source.Read(buffer, 0, buffer.Length);
            GCHandle hBuffer = GCHandle.Alloc(buffer, GCHandleType.Pinned);
            theStruct = (TStruct)Marshal.PtrToStructure(hBuffer.AddrOfPinnedObject(), typeof(TStruct));
            hBuffer.Free();
            return theStruct;
        }

    }
}
